Product includes: You will get 16 adjustable office chair levelers and 16 T-nuts, enough for your daily use. Product dimensions: The threaded rod is 18mm long, the round base measures 22mm in diameter. Please check the size before purchasing to avoid unnecessary trouble. High quality material: The screw base in the chair legs is made of PP material, which is wear-resistant, non-slip, sturdy and durable. Protects your sofa and cabinet from scratches, keeps the furniture balanced and provides good shock absorption. Wide application: The furniture leveling feet are adjustable, you can adjust the height according to your needs, avoid direct contact with the ground to protect your floors, carpets and tiles. Works on wood, laminate, hardwood, tile, carpet and more. Warm Tips: Installation requires drilling and inserting T-nuts, so it is suitable for furniture legs with a diameter of more than 25mm. If the size is too small, there is a risk of cracking during installation. In addition, it is